I suggest you only model, or try to, the only big guns used by each side.
For example.
England:
Lee-Enfield
Thompson
Webley
Vickers Mk II MG
Bazooka
Germany:
Karabiner98k
Walther P38
MP40
Panzershreck
MG42
United States:
M1 Garand
Colt .45
Thompson
Bazooka
Browning .30 calibre
Having a pack with 30 weapons for each side is stupid, really.